/*
	QMPlay2 is a video and audio player.
	Copyright (C) 2010-2017  Błażej Szczygieł

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

#include <AudioFilter.hpp>

#include <QMutex>

#define NFILT  12
#define NEFILT 17

class DysonCompressor final : public AudioFilter
{
public:
	DysonCompressor(Module &module);
	~DysonCompressor();

	bool set() override;

private:
	bool setAudioParameters(uchar chn, uint srate) override;
	int bufferedSamples() const override;
	void clearBuffers() override;
	double filter(Buffer &data, bool flush) override;

	using FloatVector = QVector<float>;

	QMutex mutex;
	bool enabled;

	int channels, sampleRate;
	int toRemove, delayedSamples;

	int ndelayptr; //ptr for the input
	double rlevelsq0, rlevelsq1;
	double rlevelsqn[NFILT];
	double rlevelsqe[NEFILT];
	QVector<FloatVector> samplesdelayed;
	/* Simple gain running average */
	double rgain;
	double lastrgain;
	/* Gainriding gain */
	double rmastergain0;
	/* Peak limit gain */
	double rpeakgain0, rpeakgain1;
	int peaklimitdelay, rpeaklimitdelay;

	int peakpercent;
	double releasetime;
	double fastgaincompressionratio, compressionratio;
};

#define DysonCompressorName "DysonCompressor"
